bluetoothctl
[NEW] Controller 00:1A:7D:DA:71:0A eax-Z270-HD3 [default]
[NEW] Device E4:17:D8:D6:6A:7D 8Bitdo FC30 GamePad
[NEW] Device E8:07:BF:05:AC:B7 NDZ-03-GA
Agent registered
[8Bitdo FC30 GamePad]# info
Device E4:17:D8:D6:6A:7D (public)
Name: 8Bitdo FC30 GamePad
Alias: 8Bitdo FC30 GamePad
Class: 0x00002540
Icon: input-keyboard
Paired: yes
Trusted: yes
Blocked: no
Connected: yes
LegacyPairing: no
UUID: Human Interface Device... (00001124-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
Modalias: usb:v2810p0009d0100
[8Bitdo FC30 GamePad]#

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udevadm info -q all -n /dev/input/js0
P: /devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/bluetooth/hci0/hci0:71/0005:2810:0009.0008/input/input22/js0
N: input/js0
E: DEVNAME=/dev/input/js0
E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/bluetooth/hci0/hci0:71/0005:2810:0009.0008/input/input22/js0
E: ID_BUS=bluetooth
E: ID_FOR_SEAT=input-pci-0000_00_14_0-usb-0_4_1_0
E: ID_INPUT=1
E: ID_INPUT_JOYSTICK=1
E: ID_PATH=pci-0000:00:14.0-usb-0:4:1.0
E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_4_1_0
E: MAJOR=13
E: MINOR=0
E: SUBSYSTEM=input
E: TAGS=:uaccess:seat:
E: USEC_INITIALIZED=1576811746

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jstest /dev/input/js0
Driver version is 2.1.0.
Joystick (8Bitdo FC30 GamePad) has 8 axes (X, Y, Z, Rz, Gas, Brake, Hat0X, Hat0Y)
and 16 buttons (BtnA, BtnB, BtnC, BtnX, BtnY, BtnZ, BtnTL, BtnTR, BtnTL2, BtnTR2, BtnSelect, BtnStart, BtnMode, BtnThumbL, BtnThumbR, ?).
Testing ... (interrupt to exit)
Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0: 0 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1: 0 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2: 0 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3: 0 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3:-32767 4: 0 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3:-32767 4:-32767 5: 0 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3:-32767 4:-32767 5:-32767 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3:-32767 4:-32767 5:-32767 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:Axes: 0:-32767 1:-32767 2:-32767 3:-32767 4:-32767 5:-32767 6: 0 7: 0 Buttons: 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:off 8:off 9:off 10:off 11:off 12:off 13:off 14:off 15:off